#ifndef TGL_INCLUDED
#define TGL_INCLUDED

//#include "tgeometry.h"
#include "tmachine.h"

#ifdef _WIN32
#include <windows.h>
//#endif

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#endif

#ifdef MACOSX
#include <GLUT/glut.h>
#define GLUT_NO_LIB_PRAGMA
#define GLUT_NO_WARNING_DISABLE
#endif

//#include "tcurves.h"
#include "traster.h"
//#include "tfilepath.h"

class TFilePath;
class TCubic;

#undef DVAPI
#undef DVVAR

#ifdef DV_LOCAL_DEFINED
#define DVAPI
#define DVVAR
#else
#ifdef TGL_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif
#endif

#ifdef TNZ_MACHINE_CHANNEL_ORDER_BGRM
#define TGL_FMT GL_BGRA_EXT
#elif TNZ_MACHINE_CHANNEL_ORDER_MBGR
#define TGL_FMt GL_ABGR_EXT
#elif TNZ_MACHINE_CHANNEL_ORDER_RGBM
#define TGL_FMT GL_RGBA
#elif TNZ_MACHINE_CHANNEL_ORDER_MRGB
#define TGL_FMT GL_BGRA
#else
@undefined chan order
#endif

#ifdef TNZ_MACHINE_CHANNEL_ORDER_MRGB
#define TGL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
#else
#define TGL_TYPE GL_UNSIGNED_BYTE
#endif

//=============================================================================

#ifdef _DEBUG
#define CHECK_ERRORS_BY_GL                     \
	{                                          \
		GLenum glErr = glGetError();           \
		assert(glErr != GL_INVALID_ENUM);      \
		assert(glErr != GL_INVALID_VALUE);     \
		assert(glErr != GL_INVALID_OPERATION); \
		assert(glErr != GL_STACK_OVERFLOW);    \
		assert(glErr != GL_STACK_UNDERFLOW);   \
		assert(glErr != GL_OUT_OF_MEMORY);     \
	}
#else
#define CHECK_ERRORS_BY_GL ;
#endif

//=============================================================================

//forward declarations
class TStroke;
class TVectorImage;
class TVectorRenderData;

//=============================================================================

//! Extension to set a vertex
inline void tglVertex(const TPointD &p) { glVertex2d(p.x, p.y); }
inline void tglVertex(const TPoint &p) { glVertex2i(p.x, p.y); }

//! Extension to set a color
inline void tglColor(const TPixel &p) { glColor4ub(p.r, p.g, p.b, p.m); }
inline void tglColor(const TPixelD &p) { glColor4d(p.r, p.g, p.b, p.m); }

//! retrieve the square of pixel size from current GL_MODELVIEW matrix
DVAPI double tglGetPixelSize2();

//! Draw text in string s at position p.

DVAPI void tglDrawText(const TPointD &p, const std::string &s, void *font = GLUT_STROKE_ROMAN);
DVAPI void tglDrawText(const TPointD &p, const std::wstring &s, void *font = GLUT_STROKE_ROMAN);

//! Returns text width

DVAPI double tglGetTextWidth(const std::string &s, void *font = GLUT_STROKE_ROMAN);

/*!
 Draw circle of radius r with center c.
 Remark: it is possible set number of slices
 */
DVAPI void tglDrawCircle(const TPointD &c, double r);

/*!
 Draw circle of radius r with center c.
 Remark: it is possible set number of slices
 */
DVAPI void tglDrawDisk(const TPointD &c, double r);

/*!
 Draw a segment.
 */
DVAPI void tglDrawSegment(const TPointD &p1, const TPointD &p2);

inline void tglDrawSegment(const TPoint &p1, const TPoint &p2)
{
	tglDrawSegment(convert(p1), convert(p2));
}

inline void tglDrawSegment(double x0, double y0, double x1, double y1)
{
	tglDrawSegment(TPointD(x0, y0), TPointD(x1, y1));
}

//inline  void  glDrawSegment(const TSegment& s){
//  glDrawSegment( s.getP0(), s.getP1() );
//}

/*!
 Draw a rect.
 */
DVAPI void tglDrawRect(const TRectD &rect);

inline void DVAPI tglDrawRect(const TRect &rect)
{
	tglDrawRect(convert(rect));
}

inline void DVAPI tglDrawRect(double x0, double y0, double x1, double y1)
{
	tglDrawRect(TRectD(x0, y0, x1, y1));
}

/*!
 Fill a rect.
 */
DVAPI void tglFillRect(const TRectD &rect);

inline void DVAPI tglFillRect(const TRect &rect)
{
	tglFillRect(convert(rect));
}

inline void DVAPI tglFillRect(double x0, double y0, double x1, double y1)
{
	tglFillRect(TRectD(x0, y0, x1, y1));
}

inline void tglMultMatrix(const TAffine &aff)
{
	GLdouble m[] =
		{
			aff.a11, aff.a21, 0, 0,
			aff.a12, aff.a22, 0, 0,
			0, 0, 1, 0,
			aff.a13, aff.a23, 0, 1};
	glMultMatrixd(m);
}

//=============================================================================

void DVAPI tglRgbOnlyColorMask();
void DVAPI tglAlphaOnlyColorMask();

void DVAPI tglEnableBlending(GLenum src = GL_SRC_ALPHA,
							 GLenum dst = GL_ONE_MINUS_SRC_ALPHA);

void DVAPI tglEnableLineSmooth(bool enable = true, double lineSize = 1.0);
void DVAPI tglEnablePointSmooth(double pointSize = 1.0);

void DVAPI tglGetColorMask(GLboolean &red, GLboolean &green, GLboolean &blue, GLboolean &alpha);
void DVAPI tglMultColorMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);

//=============================================================================

/*!
  Draw a stroke in a GL context.
  \par stroke is element to draw
  \par rd: \sa TVectorRenderData
 */
/* spostati in tvectorgl.h

void DVAPI tglDraw(const TVectorRenderData &rd, const TStroke* stroke);
void DVAPI tglDraw(const TVectorRenderData &rd, const TVectorImage* vim);
void DVAPI tglDrawMask(const TVectorRenderData &rd, const TVectorImage* vim);
*/
//=============================================================================

/*!
  Draw a vector image in a GL context.
  \par vi vector image to draw
 */
/*
void DVAPI  drawVectorImage(
                     const TVectorImageP& vim,
                     const TRect& clippingRect, 
                     const TAffine& aff,
                     const TColorFunction *cf = 0);
*/

//-----------------------------------------------------------------------------

#define NEW_DRAW_TEXT

enum GlDrawTextIndentation {
	Left = 0,
	Right = 1,
	Center = 2
};

// precision is the number of segments to draw the curve
void DVAPI tglDraw(const TCubic &cubic, int precision, GLenum pointOrLine = GL_LINE);

void DVAPI tglDraw(const TRectD &rect,
				   const std::vector<TRaster32P> &textures,
				   bool blending = true);

void DVAPI tglDraw(const TRectD &rect,
				   const TRaster32P &tex,
				   bool blending = true);

void DVAPI tglBuildMipmaps(std::vector<TRaster32P> &rasters,
						   const TFilePath &filepath);

//-----------------------------------------------------------------------------

#ifdef _WIN32
typedef std::pair<HDC, HGLRC> TGlContext;
#else
typedef void *TGlContext;
#endif

DVAPI TGlContext tglGetCurrentContext();
DVAPI void tglMakeCurrent(TGlContext context);
DVAPI void tglDoneCurrent(TGlContext context);

#endif